import type.lib.Student;
import type.lib.ITstudent;
import java.io.PrintStream;

public class Grades
{
   public static void main(String[] args)
   {
      PrintStream out = System.out;
      
      int seed = 0;
      if (args.length == 1)
      {
         seed = Integer.parseInt(args[0]);
      }
      
      Student.setSeed(seed);
      Student stu = Student.getRandom();
      
      if (stu instanceof ITstudent)
      {
         out.println("Try a different seed");
         return;
      }
      
      for (String course : stu)
      {
         String grade = stu.getCourseGrade(course);
         out.printf("course : CSE%s, grade : %s%n", course, grade);
      }
      double gpa = stu.getGpa();
      out.println("GPA is " + gpa);
      
      final double MAX_GPA = 5.0;
      if (gpa >= MAX_GPA - 1)
      {
         out.println("GPA cannot be increased by 1");
      }
      else
      {
         double currGpa = gpa;
         
         while (currGpa - gpa < 1)
         {
            // find the course with the lowest grade
            String minCourse = "";
            String minGrade = "A";
            for (String course : stu)
            {
               String grade = stu.getCourseGrade(course);
               if (grade.compareTo(minGrade) > 0)
               {
                  minCourse = course;
                  minGrade = grade;
               }
            }
            out.printf("Upgrading CSE%s from %s to A, ", minCourse, minGrade);
            
            // upgrade the mark of minCourse
            stu.setCourseGrade(minCourse, "A");
            
            // compute new gpa
            currGpa = stu.getGpa();
            out.println("GPA is " + currGpa);
         }
      }
   }
}